<template>
  <div class="login-container">
    <div class="login_box">
        <!-- 头像 -->
        <div class="avatar_box">
            <img src="../assets/images/Eason4.jpg" alt="">
        </div>
        <!-- 登录 -->
        <el-form ref="loginFormRef" class="login_form" :model="loginForm" :rules="loginFormRules">
            <!-- 用户名 -->
            <el-form-item prop="username">
                <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
            </el-form-item>
            <!-- 密码 -->
            <el-form-item prop="password">
                <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
            </el-form-item>
            <!-- 按钮 -->
            <el-form-item class="btns">
                <el-button @click="login" type="primary">登录</el-button>
                <el-button @click="resetLoginForm" type="info">重置</el-button>
            </el-form-item>
        </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data(){
      return{
          //登录表单的数据绑定对象
          loginForm: {
              username: 'admin',
              password: '123456'
          },
          //表单验证规则对象
          loginFormRules: {
              username: [
                  {required: true,message: '请输入登录名称', trigger: 'blur'},
                  { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
              ],
              password: [
                  { required: true, message: '请输入登录密码', trigger: 'blur' },
                  { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
              ]
          }
      }
  },
  methods: {
      resetLoginForm(){
        //   console.log(this.$refs);
          
          this.$refs.loginFormRef.resetFields()
      },
      login(){
          this.$refs.loginFormRef.validate(async valid =>{
              if(!valid) return
              let {data: res} = await this.$http.post('login',this.loginForm)
              if (res.meta.status !== 200) return this.$message.error('登录失败！')
              //   console.log(res);
              this.$message.success('登陆成功')

              // 1. 将登录成功之后的 token，保存到客户端的 sessionStorage 中
              //   1.1 项目中出了登录之外的其他API接口，必须在登录之后才能访问
              //   1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
              window.sessionStorage.setItem('token', res.data.token)
              // 2. 通过编程式导航跳转到后台主页，路由地址是 /home
              this.$router.push('/home')
          })
      }
  }
}
</script>

<style lang="less" scoped>
    .login-container{
        background-color: #2b4b6b;
        height: 100%;
    }
    .login_box{
        background-color: #fff;
        width: 450px;
        height: 300px;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);

        .avatar_box{
            height: 130px;
            width: 130px;
            border: 1px solid #eee;
            border-radius: 50%;
            padding: 10px;
            box-shadow: 0 0 10px #ddd;
            position: absolute;
            left: 50%;
            transform: translate(-50%,-50%);
            background-color: #fff;
            img{
                width: 100%;
                height: 100%;
                border-radius: 50%;
                background-color: #eee;
            }
        }
    }
    .login_form {
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
    }
    .btns {
        display: flex;
        justify-content: flex-end;
    }
</style>
